AT&T is planning to sell its updated 4G network as “5G Evolution” in the US. Even though your phone will be connected to an updated 4G network, you will see a “5G E” indicator on your phone. In the recently released iOS 12.2 beta release, Apple has added support for this fake 5G network.
If you are running iOS 12.2 beta on the latest iPhones (XR, XS, and XS Max), you will be seeing this new 5G E network indicator in over 400 markets. When AT&T launches real 5G network later this year, it will be indicated as “5G+”.